Single-hole dispersion relation for the real CuO2 plane

[摘要] Dispersion relation for the CuO2 hole is calculated based on the generalized t-t'-J model, recently derived from the three-band one. Numerical ranges for all model parameters, t/J=2.4-2.7, t'/t=0.0 to -0.25, t ''/t=0.1-0.15, and three-site terms 2t(N) similar to t(S) similar to J/4 have been strongly justified previously. Physical reasons for their values are also discussed. A self-consistent Born approximation is used for the calculation of the hole dispersion. Good agreement between calculated E(k) and one obtained from the angle-resolved photoemission experiments is found. A possible explantation of the broad peaks in the experimental energy distribution curves at the top of the hole band is presented.

[关键词] T-J MODEL;3-BAND MODEL;QUANTUM ANTIFERROMAGNET;COPPER OXIDES;SPIN POLARONS;SUPERCONDUCTORS;SR2CUO2CL2;REDUCTION;MOTION